The investigators hypothesize that (1) both unilateral (the InMotion3) and bilateral (the Bi-Manu-Track) robot-assisted training would bring larger benefits on motor performance and daily function than the control treatment; (2) such benefits would retain during the follow-up; (3) there would be differential immediate and retention effects of unilateral (the InMotion3) and bilateral (the Bi-Manu-Track) robot-assisted training on different outcome measures; (4) better movement reorganization as well as physiological marker expressions would be found in both robotic groups compared to control group; and (5) there would be differential effects of robotic therapy between participants with moderate vs. severe motor impairment.